diff --git a/test/std/depr/depr.c.headers/stdlib_h.pass.cpp b/test/std/depr/depr.c.headers/stdlib_h.pass.cpp
index 07ffa0b75..cc566d069 100644
--- a/test/std/depr/depr.c.headers/stdlib_h.pass.cpp
+++ b/test/std/depr/depr.c.headers/stdlib_h.pass.cpp
@@ -87,10 +87,8 @@ int main()
     static_assert((std::is_same<decltype(srand(0)), void>::value), "");
 
 //  Microsoft does not implement aligned_alloc in their C library
-#ifndef TEST_COMPILER_C1XX
-#if TEST_STD_VER > 14 && defined(TEST_HAS_C11_FEATURES)
+#if TEST_STD_VER > 14 && defined(TEST_HAS_C11_FEATURES) && !defined(_WIN32)
     static_assert((std::is_same<decltype(aligned_alloc(0,0)), void*>::value), "");
-#endif
 #endif
 
     static_assert((std::is_same<decltype(calloc(0,0)), void*>::value), "");
diff --git a/test/std/language.support/support.runtime/cstdlib.pass.cpp b/test/std/language.support/support.runtime/cstdlib.pass.cpp
index e9dda6cee..02c8c9fd8 100644
--- a/test/std/language.support/support.runtime/cstdlib.pass.cpp
+++ b/test/std/language.support/support.runtime/cstdlib.pass.cpp
@@ -75,10 +75,8 @@ int main()
     static_assert((std::is_same<decltype(std::srand(0)), void>::value), "");
 
 //  Microsoft does not implement aligned_alloc in their C library
-#ifndef TEST_COMPILER_C1XX
-#if TEST_STD_VER > 14 && defined(TEST_HAS_C11_FEATURES)
-    static_assert((std::is_same<decltype(std::aligned_alloc(0,0)), void*>::value), "");
-#endif
+#if TEST_STD_VER > 14 && defined(TEST_HAS_C11_FEATURES) && !defined(_WIN32)
+    static_assert((std::is_same<decltype(aligned_alloc(0,0)), void*>::value), "");
 #endif
 
     static_assert((std::is_same<decltype(std::calloc(0,0)), void*>::value), "");